WHITE SAUCE: Place flour in a saucepan or bowl. Gradually add soymilk, stirring until smooth. Place over medium heat and stir (or microwave on HIGH 100% for 7 minutes, stirring after every minute) until mixture boils and thickens. Stir through salt and 1/2 cup soy cheese.

LASAGNA: To assemble, place a layer of lasagna sheets over the base of a lightly greased oven-proof dish. Spread with half of the tomato sauce mixture, then half of the white sauce mixture. Repeat lasagna sheet, tomato and white sauce layers ending with white sauce. Sprinkle with extra 1/2 cup soy cheese.